Objective: The objective of this study was to determine the effects of two levels of caffeine doses (5 &10 mg/kg) on endurance exercise performance of normal young male African adults.Method: Twenty normal young male adults volunteers, participated. A repeated measures three randomized crossover (counter balanced) double blind design was used in data collection. Subjects engaged in 20 meter shuttle run test (20 MST) one hour Post caffeine(5, & 10 mg/kg) and placebo doses ingestion.Exercise Performance indices (VO2 max, run time & number of exercise laps) were recorded. Result: Repeated measures ANOVA was used to assess the level of significant difference between caffeine doses and placebo dose in VO2 max, run time and number of exercise laps. The result showed no significant effect of the two (5 & 10mg/kg) doses of caffeine over placebo dose in all exercise performance indices investigated at p<0.05.Conclusion: It was concluded that caffeine doses up to 10 mg/kg seems not have any ergogenic effect on max aerobic power of normal young black African male Adults.